Akira Ajisawa

Title: Akira Ajisawa: Innovator in Infrared Detection and Optical Semiconductor Devices

Introduction

Akira Ajisawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of infrared detection and optical semiconductor devices. With a total of 3 patents, his work has advanced technology in various applications.

Latest Patents

One of Ajisawa's latest inventions is a bolometer type infrared detector. This device is designed to restrict temperature drift due to self-heating and features a structure that minimizes degradation of characteristics caused by noise. The bolometer type infrared detector includes a bolometer thin film that serves as the infrared ray detecting element, which is divided into multiple rectangular elements connected in series.

Another notable invention is an optical semiconductor device. This device comprises a stripe-mesa structure built on a semi-insulating substrate. The structure includes an undoped light absorption layer sandwiched between cladding layers, with burying layers on both sides. This design reduces device capacitance, enabling wide bandwidth and ultra-high-speed operation properties. The optical semiconductor device can be applied in various technologies, including optical modulators and optical detectors.

Career Highlights

Ajisawa is currently associated with NEC Corporation, where he continues to innovate and develop cutting-edge technologies. His work has garnered attention for its practical applications and contributions to the field.

Collaborations

Throughout his career, Ajisawa has collaborated with notable colleagues, including Tomoji Terakado and Masayuki Yamaguchi. These collaborations have further enriched his research and development efforts.

Conclusion

Akira Ajisawa's contributions to infrared detection and optical semiconductor devices highlight his role as a leading inventor in his field. His innovative patents reflect a commitment to advancing technology and improving device performance.